Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
199: | \[{5^{199}-1\over4}\] | 53731 × 57908984365274624584914333008692600552662821915850878758083011806868463587457738002121166767096402607032872918381590535488973250751801<134> |